Is it reliable for plumbers to pay to join the recruitment group?

Not reliable. Generally speaking, some groups recruiting plumbers may charge a certain joining fee. However, it should be noted that in order to cheat money, some groups will deliberately fabricate positions or not provide substantive help after job seekers join, thus making job seekers waste money and time and energy. Therefore, before entering such a group, it is necessary to conduct full investigation and understanding to ensure its authenticity and credibility.